My Inquiry
My Account
Vishay Siliconix DG445DJ
- Part No.:
- DG445DJ
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
DG445DJ.pdf
- Description:
- IC SWITCH SPST-NOX4 85OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,123
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DG445DJ from Vishay Siliconix is a quad single-pole single-throw (SPST) analog switch with normally open (NO) configuration, designed for bidirectional signal routing in precision analog systems. It delivers 50 Ω typical on-resistance, 120 ns typical turn-on time, and ±15 V dual-supply operation - enabling low-distortion audio switching, sample-and-hold circuits, and data acquisition front-ends.
For engineers reviewing the DG445DJ datasheet, DG445DJ pinout, DG445DJ application, or DG445DJ equivalent, key selection considerations include its 80 pA max off-leakage at full temperature range, 22 nW typical power consumption, TTL/CMOS logic compatibility, and upgrade path from legacy DG212 sockets.
Technical Context
The DG445DJ implements four independent CMOS transmission gates fabricated on Vishay's high-voltage silicon-gate process, supporting analog signal ranges from –15 V to +15 V under ±15 V dual supplies. Each channel features symmetrical conduction and blocking behavior, with internal epitaxial layer latchup protection.
Its digital control interface accepts 0.8 V low / 2.4 V high logic thresholds referenced to VL (logic supply), and operates across –40 °C to +85 °C. Charge injection is minimized to –1 pC (typ.) for precision sampling, and off-isolation exceeds 60 dB at 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance | 50 Ω typ. - ensures minimal signal attenuation and gain error in precision resistor networks |
| Turn-on time | 120 ns typ. - enables fast multiplexing in data acquisition systems up to ~1 MHz effective throughput |
| Off-leakage current | ±0.01 nA typ. - preserves voltage integrity in high-impedance sample-and-hold hold capacitors |
| Analog signal range | ±15 V - supports rail-to-rail analog signals without clamping when used within absolute max ratings |
| Logic supply (VL) | 5 V - allows direct interfacing with standard TTL/CMOS controllers without level-shifting circuitry |
| Power consumption | 22 nW typ. - enables battery-powered operation for >10 years in low-duty-cycle monitoring applications |
| Charge injection | –1 pC typ. - limits pedestal error to <1 mV on 1 nF hold capacitors, critical for 12-bit+ accuracy |
Pinout & Package
Package: 16-pin plastic DIP (JEDEC MS-012), 0.300-inch wide body, through-hole mountable with 2.54 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | IN1–IN4 (digital control inputs) | Active-high logic inputs controlling respective SPST switches; compatible with 5 V TTL/CMOS |
| 2, 6, 10, 14 | S1–S4 (sources) | Analog input terminals; bidirectional when switch is on, isolated to ±15 V when off |
| 3, 7, 11, 15 | D1–D4 (drains) | Analog output terminals; electrically identical to sources in conduction and blocking behavior |
| 4 | V− | Negative analog supply rail; must be connected for dual-supply operation or tied to GND for single-supply use |
| 8 | GND | Ground reference for logic and substrate; separate from analog ground in mixed-signal layouts |
| 12 | VL | Logic supply input; decoupled 5 V source required for proper input threshold definition |
| 16 | V+ | Positive analog supply rail; sets upper bound of analog signal range (e.g., +15 V with V− = –15 V) |
Key Features
| Feature | Design Value |
|---|---|
| Normally open (NO) topology | Ensures default signal isolation during power-up, reset, or controller failure - critical for safety-critical analog paths |
| Low 50 Ω on-resistance | Reduces insertion loss and THD in audio paths; maintains linearity for ±10 V signals with <0.05% gain error |
| 80 pA max off-leakage (full temp) | Extends hold time beyond 10 seconds on 10 nF capacitors in sample-and-hold applications |
| TTL/CMOS logic compatibility | Eliminates need for external level shifters when interfacing with microcontrollers, FPGAs, or ASICs operating at 5 V |
| DG212 socket upgrade | Pin-compatible replacement with improved speed (120 ns vs. 250 ns), lower leakage, and wider supply range |
Applications
| Audio Signal Routing | Data Acquisition Multiplexing |
|---|---|
|
Use Scenario: Switching between multiple microphone preamp outputs to a shared ADC channel in professional audio mixers. IC Role / Device Role / Timing Role: Quad SPST analog switch providing isolated, low-noise signal path selection with sub-120 ns settling. Use Value: 50 Ω RDS(on) and <1 pC charge injection prevent audible clicks and preserve SNR >100 dB across 20 Hz–20 kHz bandwidth. |
Use Scenario: Scanning 16-channel sensor array (thermocouples, strain gauges) into a single precision ADC in industrial PLC modules. IC Role / Device Role / Timing Role: Four independently controlled switches enabling sequential channel connection while maintaining high common-mode rejection. Use Value: ±15 V analog range accommodates sensor excitation voltages; 80 pA leakage avoids drift >1 LSB in 16-bit measurements over 100 ms sampling intervals. |
| Precision Sample-and-Hold | Telecom Line Interface |
|
Use Scenario: Capturing transient voltage waveforms from RF detectors or pulse generators for oscilloscope digitization. IC Role / Device Role / Timing Role: Normally open switch isolating hold capacitor during acquisition phase; closed only during precise sampling window. Use Value: –1 pC typical charge injection limits pedestal error to <0.5 mV on 2.2 nF hold capacitors - enabling accurate 12-bit waveform capture. |
Use Scenario: Selecting between primary and backup signaling paths in T1/E1 line cards with automatic failover. IC Role / Device Role / Timing Role: Bidirectional analog switch routing differential line signals while maintaining impedance continuity and crosstalk <–100 dB. Use Value: 60 dB off-isolation at 1 MHz and matched 4 pF off-capacitance per terminal ensure minimal signal degradation in 1.544 Mbps data streams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617CPN+ | Higher on-resistance (100 Ω typ.), slower tON (200 ns), but offers 3 V logic compatibility and shutdown mode | Better suited for low-voltage portable instrumentation where 3 V MCU control is mandatory | Select MAX4617CPN+ only if system uses 3 V logic and requires power-down capability; DG445DJ remains superior for ±15 V signal integrity |
| ADG445BNZ | Identical pinout and NO function, but higher leakage (±200 pA max) and no specified charge injection value | Acceptable for non-critical DC-coupled switching where pedestal error is not constrained | ADG445BNZ may simplify sourcing if DG445DJ is unavailable, but verify leakage impact on hold-time requirements before substitution |
Compared with MAX4617CPN+ and ADG445BNZ, the DG445DJ provides the lowest combination of on-resistance, charge injection, and off-leakage - making it the preferred choice for precision sample-and-hold, audio, and high-fidelity data acquisition where signal fidelity is non-negotiable.
Availability
DG445DJ is available at Aetrix Electronics and suitable for audio switching, data acquisition, and sample-and-hold circuits requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for DG445DJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Siliconix is a global leader in discrete semiconductors and passive components, specializing in high-reliability analog switching, power management, and sensing solutions for industrial and telecom infrastructure.
The DG445DJ belongs to Vishay's high-voltage CMOS analog switch product line, engineered specifically for precision signal routing in systems demanding low distortion, wide dynamic range, and robust latchup immunity.
FAQ
What is the maximum analog signal voltage range supported by the DG445DJ?
The DG445DJ supports an analog signal range of ±15 V when operated with ±15 V dual supplies (V+ = +15 V, V− = −15 V). This is confirmed in the "Analog Signal Range" specification table on page 2 of the Vishay datasheet S13-2503-Rev. H. Signals exceeding V+ or V− are clamped by internal diodes, so input voltages must remain within these rails for linear operation. The DG445DJ also supports unipolar operation from 0 V to +12 V with appropriate supply configuration.
Is the DG445DJ pin-compatible with the DG212 series?
Yes, the DG445DJ is a direct pin-compatible upgrade for the DG212 in 16-pin DIP packages. The datasheet explicitly states "DG211, DG212 upgrades" in the Features section and confirms identical pin configuration in the Functional Block Diagram and Pin Configuration diagram on page 1. No PCB layout changes are required when replacing DG212 with DG445DJ, though performance improvements - including faster switching (120 ns vs. 250 ns) and lower leakage - are realized immediately.
What is the logic supply requirement for the DG445DJ, and can it operate without VL?
The DG445DJ requires a dedicated 5 V logic supply (VL) connected to pin 12, as specified in all test conditions and functional diagrams. VL defines the logic threshold (0.8 V low / 2.4 V high) and must be decoupled locally. Operation without VL is not supported - leaving VL floating or unconnected will result in undefined switching behavior and potential device malfunction. The datasheet does not specify operation with VL tied to V+ or GND.
How does the DG445DJ handle bidirectional analog signals?
The DG445DJ uses symmetrical CMOS transmission gate architecture, allowing equal conduction in both directions when enabled. Its datasheet confirms "Each switch conducts equally well in both directions when on, and blocks input voltages to the supply levels when off." This makes it suitable for AC-coupled audio paths, differential telecom signals, and any application where signal flow direction is not fixed - unlike unidirectional switches that impose source/drain polarity constraints.
What thermal derating applies to the DG445DJ in plastic DIP package?
For the DG445DJ in 16-pin plastic DIP (DG445DJ), power dissipation must be derated by 6 mW/°C above +75 °C ambient, as stated in Note c on page 2 of the datasheet. The maximum rated power dissipation at ≤75 °C is 450 mW. At +105 °C ambient, allowable power drops to 450 mW − (30 °C × 6 mW/°C) = 270 mW. This derating ensures junction temperature remains within safe limits under sustained load conditions.
DG445DJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 85Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 5V ~ 36V
- Voltage - Supply, Dual (V±):
- ±5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 250ns, 210ns
- -3db Bandwidth:
- -
- Charge Injection:
- -1pC
- Channel Capacitance (CS(off), CD(off)):
- 4pF, 4pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -100dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
DG445DJ FAQ
1.How can I place an order for DG445DJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG445DJ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DG445DJ reliable?
The price and inventory of DG445DJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG445DJ is usually 5 days.
3.What payment methods are accepted for DG445DJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG445DJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG445DJ?
DG445DJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG445DJ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DG445DJ?
For technical support, including DG445DJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG445DJ requirements.
6.How does Aetrix verify that DG445DJ is sourced from the original manufacturer or authorized distributors?
All DG445DJ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DG445DJ meets industry standards.
7.What is the process for return or replacement of DG445DJ?
All DG445DJ units undergo pre-shipment inspection (PSI). If there is an issue with DG445DJ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DG445DJ part is unused and in its original packaging.
Return procedure for DG445DJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DG445DJ Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
